| Jack Coolahan | |
| Fullname: | Jack Coolahan |
| Birth Date: | 22 August 1914 |
| Originalteam: | Mortlake |
| Height: | 180 cm |
| Weight: | 84 kg |
| Statsend: | 1939 |
| Years1: | 1937 |
| Games Goals1: | 2 (1) |
| Years2: | 1938–39 |
| Games Goals2: | 12 (12) |
| Games Goalstotal: | 14 (13) |
Jack Coolahan (22 August 1914 – 22 April 1988) was a former Australian rules footballer who played with Melbourne and Footscray in the Victorian Football League (VFL).[1] He returned to his original club Mortlake in 1940, as coach.[2]